In this experiment, I will show how rocks can be broken down by chemical weathering.
Cast of characters for this experiment:

Vinegar{It really stinks!}, limestone rock{from our driveway}, large glass{Gig 'Em Aggies}, some steel wool{I had to get this from Nana's}, and a small bowl.
Now let's get started...First I added a limestone rock to the Aggie glass.
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I was very careful not to plop it in too quickly and break the glass. Mom wouldn't have liked that very much.
Next I filled the glass...
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3/4 full of vinegar.
Then we watched the rock for a while
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{Tick. Tock.}
and saw lots of bubbles form and float to the top.
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You can sort of see the bubbles here. The bubbles make the water look cloudy on the top of the rock. It was hard to get a good picture. They were bubbles like you see in Sprite when you first pour it.
The next part of the experiment has you place some steel wool in a bowl. I cut the steel wool that I got from Nana's in half.
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Mom says that steel wool is great for sharpening scissors. I tried it out.

I poured vinegar over the steel wool.
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I poured enough into the bowl so that it covered half the steel wool.
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Next you have to let the steel wool sit in the vinegar overnight.
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I turned it a few times through the night to make sure all the steel wool got a fair chance to soak in the vinegar bath.
Fair is fair after all!
The next morning I examined the glass with the rock.
I swirled the glass a little and looked at the sediments in the vinegar that came from the rock. It looked like sand in the bottom of the glass.
I also looked at the steel wool.

It had stuff floating in the vinegar and had 'rust' along the edge of the bowl.
Wala! Chemical breakdown of some pretty tough stuff.